JPS5951343U - screen - Google Patents

screen

Info

Publication number
JPS5951343U
JPS5951343U JP1983129668U JP12966883U JPS5951343U JP S5951343 U JPS5951343 U JP S5951343U JP 1983129668 U JP1983129668 U JP 1983129668U JP 12966883 U JP12966883 U JP 12966883U JP S5951343 U JPS5951343 U JP S5951343U
Authority
JP
Japan
Prior art keywords
plane
sheet
tip
degrees
curved side
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1983129668U
Other languages
Japanese (ja)
Inventor
ジヨン・ブラウン
Original Assignee
カンテイツクス・コ−ポレ−シヨン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by カンテイツクス・コ−ポレ−シヨン filed Critical カンテイツクス・コ−ポレ−シヨン
Publication of JPS5951343U publication Critical patent/JPS5951343U/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

）　　　第１図は本考案に従って構成されたスクリーン
基　　を用いた映写説明図、第２図はスクリーン前面の
シ　　一部拡大斜視図、第３図はスクリーン背面の一部
５　　拡大斜視図である。 ５　　１０・・・・・・映写機、１１・・・・・・スク
リーン、１２・・・：　　・・・前面、１３・・・・・
・突条、１４．１５・・・・・・側面、シ１６・・・・
・・隆起帯。1 is an explanatory diagram of projection using a screen base constructed according to the present invention, FIG. 2 is a partially enlarged perspective view of the front side of the screen, and FIG. 3 is a partially enlarged perspective view of the back side of the screen. 5 10...Projector, 11...Screen, 12...:...Front, 13...
・Protrusion, 14.15... Side, 16...
...Elevated zone.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] １枚の光透過性物質のシートから成り、この波透過性物
質４５度以下の内部反射の所定の臨界声変を有し、スク
リーンの背面は多数の千行突条力ら成り、各突条の側面
は先端へ向って彎曲し、二′の彎曲状側面はシートに直
接隣接する箇所にお（゛て４５度あるいはそれ以上の角
度でこのシート力ら突出しており、彎曲側面の接線とシ
ートとの声変は、この彎曲状側面が先端に向うにつれて
、逼続的に少さくなり、またこの角度は４５度以下で且
つ先端において内部反射の所定の臨界角度に帛しいかあ
るいはそれ以上であり、突条の先端は芽１平面を区分し
、スクリーンの前面は、はぼ同じ焦点距離の円筒状断面
の多数の全面均一な平行Ｍ起帯から成っており、この前
面の隆起帯は上記背−面の突条と直交しており、ここで
隆起帯の下端は、１　　第１平面と合わさった第２平面
を区分しており、）　　第１平面から第２平面までの距
離が、隆起帯の焦、　　点距離の３０〜７０％であるこ
とを特徴とするスフ）　　−リーン。Consisting of one sheet of light-transmitting material, this wave-transmitting material has a predetermined critical tone change of internal reflection of less than 45 degrees, and the back surface of the screen is composed of a large number of ridges, each ridge The side surface of the curved side is curved towards the tip, and the curved side surface of the 2' side is directly adjacent to the sheet (so that it projects from this sheet force at an angle of 45 degrees or more, and the tangent of the curved side surface and the sheet The change in voice becomes progressively smaller as this curved side approaches the tip, and this angle is less than 45 degrees and at the tip is greater than or equal to a predetermined critical angle for internal reflection. The tips of the ridges divide the plane of the bud, and the front surface of the screen consists of many uniform parallel M-shaped zones with cylindrical cross sections of approximately the same focal length. perpendicular to the protrusion on the dorsal surface, where the lower end of the protuberance zone delimits a second plane joined to the first plane, and the distance from the first plane to the second plane is Focus of the band, characterized by being 30-70% of the point distance) - Lean.
JP1983129668U 1974-12-19 1983-08-22 screen Pending JPS5951343U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US534298 1974-12-19
US05/534,298 US3938876A (en) 1974-12-19 1974-12-19 Front projection screen made from a transparent material

Publications (1)

Publication Number Publication Date
JPS5951343U true JPS5951343U (en) 1984-04-04

Family

ID=24129490

Family Applications (2)

Application Number Title Priority Date Filing Date
JP50150488A Pending JPS5188022A (en) 1974-12-19 1975-12-17
JP1983129668U Pending JPS5951343U (en) 1974-12-19 1983-08-22 screen

Family Applications Before (1)

Application Number Title Priority Date Filing Date
JP50150488A Pending JPS5188022A (en) 1974-12-19 1975-12-17

Country Status (4)

Country Link
US (1) US3938876A (en)
JP (2) JPS5188022A (en)
CA (1) CA1051237A (en)
DE (1) DE2557190C2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387959A (en) * 1981-01-06 1983-06-14 Zenith Radio Corporation Rear projection screen
US20050185279A1 (en) * 1999-01-21 2005-08-25 Reflexite Corporation Durable, open-faced retroreflective prismatic construction
US6967053B1 (en) 1999-01-21 2005-11-22 Reflexite Corporation Durable, open-faced retroreflective prismatic construction
US6530664B2 (en) * 1999-03-03 2003-03-11 3M Innovative Properties Company Integrated front projection system with enhanced dry erase screen configuration
US6600600B2 (en) * 2000-08-14 2003-07-29 Cid, Inc. Projection screen and projection method
US7506987B2 (en) * 2007-03-02 2009-03-24 Technology Solutions & Invention Llc Two-sided corner-cube retroreflectors and methods of manufacturing the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2351034A (en) * 1944-06-13 Optical system composed of
US2991693A (en) * 1956-07-23 1961-07-11 American Optical Corp Front projection screen
US3782805A (en) * 1972-11-30 1974-01-01 Qantix Corp Front projection screen made from a transparent material

Also Published As

Publication number Publication date
DE2557190A1 (en) 1976-07-01
JPS5188022A (en) 1976-08-02
DE2557190C2 (en) 1984-06-28
CA1051237A (en) 1979-03-27
US3938876A (en) 1976-02-17

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